Brother LK3-B434E MKII Manuel Du Propriétaire

ZE-855A,856A

Adjust so that the end of the rotary hook holder 

q is 0 to

0.5 mm back from end A of the inner rotary hook 

w.

*

The end of the rotary hook holder 

q must never ex-

tend to the right of end A of the inner rotary hook 

w.

1. Loosen the screw 

e and adjust the position of the ro-

tary hook holder 

q.

2. Securely tighten the screw 

e.

1

1. Turn on the power switch.

1

2. Press the TEST key 

q and check that the TEST indica-

tor 

e is illuminated.

(For safety purposes, be sure to carry out this step, as
it prevents the motor from operating even if the treadle
is depressed.)

1

3. Set both the zigzag width and the zigzag base line po-

sition to “0”. (Refer to pages 77-79.)

1

4. Remove the presser foot 

r, needle plate t, auxiliary

needle plate 

w, feed dog y and spacer u (856A only).

(Refer to 12-7 on page 151.)

1

5. Place the auxiliary needle plate 

w on the needle plate

installation surface of the machine bed.

1

6. Turn the machine pulley to move the needle bar 

i from

its lowest position, and check the following when the
distance from the top of the auxiliary needle plate 

w

to the bottom edge of the needle bar 

i is the same as

the height of accessory timing gauge 2 

o.

•     The tip of the rotary hook 

!0 should be aligned with

the center of the needle.

•    The distance from the tip of the rotary hook 

!0  to

the needle should be 0 to 0.05 mm.

The needle plate 

t and the auxiliary needle plate

w are of different thicknesses, so be sure to use
the auxiliary needle plate 

w.

1

7. If the above are not correct, loosen the two screws 

!1

and adjust the position of the rotary hook 

!2.

After adjustment, securely tighten the two screws 

!1.

1

8. Set the zigzag width to the maximum setting (8 mm).

1

9. Turn the machine pulley to move the needle to its fur-

thest left position so that the tip of the rotary hook 

!0

is aligned with the center of the needle, and check that
the distance from the upper edge of the needle hole to
the tip of the rotary hook 

!0 is 0.2 to 0.5 mm at this

time.
*    If the distance is not correct, adjust the height of

the needle bar. (Refer to page 151.)

10. If needle deflection occurs when sewing material with

joints, bend the needle guard 

!3 as shown in the illus-

tration A so that it touches the needle.
*    After this, check that the clearance between the tip of

the rotary hook 

!0 and the needle is 0 to 0.05 mm.

11. Press the TEST key 

q so that the TEST indicator e

switches off.
Normal sewing will then be possible.
Turn off the power to continue adjustment.

q

e

q

e

w

A

e
q

i

o

w

!0

!0

!0

!2

!1

!0

!3

A

Maximum zigzag width

0 to 0.05 mm

0.2 to 0.5 mm

0 to 0.05 mm

0 - 0.5 mm

Index mark

A

B

C

Zigzag width

8mm

10mm

5mm

Zigzag width 0mm